Hitachi Global Storage Technologies Netherlands B.v.

Tatsuo Hayakawa

Toshiki Hirano

Hitoshi Tamura

Takanori Kawakami

Embodiments of the invention provide a retaining ring attaching device capable of improving assembling efficiency and a data storage device fabricating method. In one embodiment, a C ring attaching device included in a hard disk drive assembling apparatus expands a C ring, puts the expanded C ring on a pivot, and contracts the C ring on the pivot. The C ring attaching device moves chuck arms holding the C ring such that the C ring is moved so that a gap in the C ring moves away from the pivot while the C ring is being contracted.

Retaining ring attaching device and data storage

An apparatus and method for adjusting balance in a disk drive, and a method for assembling a disk drive, enables the modification of dynamic balance reliably and efficiently. The apparatus adjusts balance in a hard disk drive having disks and a spindle which are assembled in a base. The acceleration to be applied from an actuator is made to act on the top end of the spindle through a holder plate in one accelerator, while the acceleration to be applied from an actuator is made to act on the base end of the spindle through the base in another accelerator.

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Kanagawa, Japan

Tatsuo Hayakawa